What was found
WHILE ACCOMPLISHING T.C. NG-21EA-23228-1, TCV LIGHT ILLUMINATED DURING BITE TEST OF #2 PACK/ZONE TEMP CONTROLLER. GROUNDED - YES. REMOVED AND REPLACED RH TEMPERATURE CONTROL VALVE REF B737-800 AMM 21-51-10. REQUIRES TEST 1 OP CHECK OF TEMP CONTROL VALVE. PERFORMED OP'S CHECK PER AMM 21-61-00-700-806. LEAK TEST FAIL. FOUND LEAK AT AFT CLAMP LOOSEN DUCT, INSTALLED TWO NEW CLAMPS AND READJUSTED CLAMPS PER AMM 20-50-11-910-801. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST, PER AMM 21-61-00-700-806-002, OPS CHECK AND LEAK CHECK GOOD, NO FAULTS NOTED.